Last frost date in West Haven, Connecticut
April 17
Average last frost in spring. In an early year (1 in 10) it's over by April 2; in a late year (1 in 10) it comes after May 1.
October 27
Average first frost in fall. 1 year in 10 it comes by October 11.
Source: NOAA U.S. Climate Normals 1991–2020, station New Haven Tweed AP (USW00014758), 4.2 miles from West Haven, elevation 3 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 2 | Apr 17 | May 1 |
| First frost in fall | Oct 11 | Oct 27 | Nov 8 |
An early or late year is one in 10: 1 year in 10 the frost comes before the early date, and 1 year in 10 after the late date.
Frost-free days in an average year: 193
Planting calendar for West Haven
Fall planting
USDA dates for places whose average first freeze is about October 30 (West Haven: October 27).
- Black-eyed peasJune 1 – Aug 1 (past for this year)
- CucumbersJune 1 – Aug 1 (past for this year)
- Eggplant plantsJune 1 – July 1 (past for this year)
- New Zealand spinachJune 1 – Aug 1 (past for this year)
- OkraJune 1 – Aug 10 (past for this year)
- Peppers plantsJune 1 – July 20 (past for this year)
- SalsifyJune 1 – July 10 (past for this year)
- SoybeansJune 1 – July 15 (past for this year)
- Summer squashJune 1 – Aug 1 (past for this year)
- Sweet cornJune 1 – Aug 1 (past for this year)
- Sweet potatoesJune 1 – 15 (past for this year)
- Swiss chardJune 1 – Sept 10 (past for this year)
- TomatoesJune 1 – July 1 (past for this year)
- Winter squashJune 10 – July 10 (past for this year)
- Celery and celeriac plantsJune 15 – Aug 15 (past for this year)
- Broccoli plantsJuly 1 – Aug 15 (past for this year)
- Brussels sprouts plantsJuly 1 – Aug 15 (past for this year)
- Cantaloupe (muskmelon)July 1 – 15 (past for this year)
- CarrotsJuly 1 – Aug 15 (past for this year)
- Florence fennelJuly 1 – Aug 1 (past for this year)
- Lima beansJuly 1 – Aug 1 (past for this year)
- Snap beansJuly 1 – Aug 15 (past for this year)
- WatermelonJuly 1 – 15 (past for this year)
- Witloof chicoryJuly 1 – Aug 10 (past for this year)
- Cauliflower plantsJuly 15 – Aug 15 (past for this year)
- EndiveJuly 15 – Aug 15 (past for this year)
- KaleJuly 15 – Sept 1 (past for this year)
- RutabagaJuly 15 – Aug 1 (past for this year)
- PotatoesJuly 20 – Aug 10 (past for this year)
- BeetsAug 1 – Sept 1 (past for this year)
- Cabbage plantsAug 1 – Sept 1 (past for this year)
- Chinese cabbageAug 1 – Sept 15 (past for this year)
- Collards plantsAug 1 – Sept 15 (past for this year)
- Garden peasAug 1 – Sept 15 (past for this year)
- Head lettuce plantsAug 1 – Sept 15 (past for this year)
- KohlrabiAug 1 – Sept 1 (past for this year)
- ParsleyAug 1 – Sept 15 (past for this year)
- SorrelAug 1 – Sept 15 (past for this year)
- TurnipsAug 1 – Sept 15 (past for this year)
- DandelionAug 15 – Oct 1 (past for this year)
- Leaf lettuceAug 15 – Oct 1 (past for this year)
- Mustard greensAug 15 – Oct 15 (past for this year)
- RadishesAug 15 – Oct 15 (past for this year)
- SpinachSept 1 – Oct 1 (past for this year)
- Corn saladSept 15 – Nov 1Now
- Upland cressSept 15 – Nov 1Now
- Rhubarb plantsNov 1 – Dec 1Soon
- Asparagus plantsNov 15 – Jan 1Soon
USDA lists chervil and chives, garlic, horseradish, leeks, parsnips, shallots as generally spring-planted here.
Spring planting
USDA dates for places whose average last freeze is about April 20 (West Haven: April 17).
- Corn saladFeb 15 – Apr 15
- SpinachMar 1 – Apr 15
- Cabbage plantsMar 10 – Apr 1
- Chervil and chivesMar 10 – Apr 10
- Collards plantsMar 10 – June 1
- DandelionMar 10 – Apr 10
- Garden peasMar 10 – Apr 10
- GarlicMar 10 – Apr 1
- Onion setsMar 10 – Apr 1
- RadishesMar 10 – May 10
- Rhubarb plantsMar 10 – Apr 10
- TurnipsMar 10 – Apr 1
- Asparagus plantsMar 15 – Apr 15
- Cauliflower plantsMar 15 – Apr 20
- LeeksMar 15 – Apr 15
- Onion plants plantsMar 15 – Apr 10
- Onion seedMar 15 – Apr 1
- PotatoesMar 15 – Apr 10
- ShallotsMar 15 – Apr 15
- SorrelMar 15 – May 1
- BeetsMar 20 – June 1
- Head lettuce plantsMar 20 – Apr 15
- Horseradish plantsMar 20 – Apr 20
- KaleMar 20 – Apr 10
- KohlrabiMar 20 – May 1
- Leaf lettuceMar 20 – May 15
- Mustard greensMar 20 – May 1
- ParsleyMar 20 – Apr 20
- ParsnipsMar 20 – Apr 20
- SalsifyMar 20 – May 1
- Upland cressMar 20 – May 1
- Broccoli plantsMar 25 – Apr 20
- Brussels sprouts plantsMar 25 – Apr 20
- EndiveMar 25 – Apr 15
- Florence fennelMar 25 – Apr 15
- CarrotsApr 1 – May 15
- Swiss chardApr 1 – June 15
- Celery and celeriac plantsApr 10 – May 1
- Snap beansApr 25 – June 30
- Sweet cornApr 25 – June 15
- Cantaloupe (muskmelon)May 1 – June 15
- CucumbersMay 1 – June 15
- Lima beansMay 1 – June 20
- New Zealand spinachMay 1 – June 15
- OkraMay 1 – June 1
- Summer squashMay 1 – June 15
- WatermelonMay 1 – June 15
- TomatoesMay 5 – June 10
- Black-eyed peasMay 10 – June 15
- Eggplant plantsMay 10 – June 1
- Peppers plantsMay 10 – June 1
- SoybeansMay 10 – June 20
- Sweet potatoesMay 10 – June 10
- Witloof chicoryJune 15 – July 1
USDA lists chinese cabbage as generally fall-planted here.
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5 (earliest safe spring and latest safe fall dates), applied to this place's NOAA frost dates. “Plants” means setting out transplants, not sowing seed. How we match the table.